Muffins are smaller versions of quick bread that are often moister, richer, and sweeter than scones or biscuits. They are usually baked in muffin tins from a batter made from all-purpose flour, sugar, baking powder/soda, eggs, fat and milk. There are two types of muffins - bread-like muffins with less sugar and fat using oil or melted butter, and cake-like muffins with more sugar and butter using creamed butter and sugar for a more tender crumb. When mixing muffin batter, it is important to not overmix and to leave the batter lumpy.